TY - JOUR
T1 - A study of secondary organic aerosol formation in the anthropogenic-influenced southeastern United States
JF - Journal of Geophysical Research-Atmospheres
Y1 - 2007
A1 - Weber, R. J.
A1 - Sullivan, A. P.
A1 - Peltier, R. E.
A1 - Russell, A.
A1 - Yan, B.
A1 - Zheng, M.
A1 - de Gouw, J.
A1 - Warneke, C.
A1 - Brock, C.
A1 - Holloway, J. S.
A1 - Atlas, E. L.
A1 - Edgerton, E.
AB - [1] The formation of secondary organic aerosol (SOA) in an anthropogenic-influenced region in the southeastern United States is investigated by a comparison with urban plumes in the northeast. The analysis is based on measurements of fine-particle organic compounds soluble in water (WSOC) as a measure of secondary organic aerosol. Aircraft measurements over a large area of northern Georgia, including the Atlanta metropolitan region, and in plumes from New York City and surrounding urban regions in the northeast show that fine-particle WSOC are spatially correlated with vehicle emission tracers (e.g., CO), yet the measurements indicate that vehicles do not directly emit significant particulate WSOC. In addition to being correlated, WSOC concentrations were in similar proportions to anthropogenic tracers in both regions, despite biogenic volatile organic compounds (VOCs) that were on average 10-100 times higher over northern Georgia. In contrast, radiocarbon analysis on WSOC extracted from integrated filters deployed in Atlanta suggests that roughly 70-80% of the carbon in summertime WSOC is modern. If both findings are valid, the combined results indicate that in northern Georgia, fine-particle WSOC was secondary and formed through a process that involves mainly modern biogenic VOCs but which is strongly linked to an anthropogenic component that may largely control the mass of SOA formed. Independent of the radiocarbon results, a strong association between SOA and anthropogenic sources has implications for control strategies in urban regions with large biogenic VOC emissions.
VL - 112
IS - D13
N1 - id: 788; 187XB Times Cited:47 Cited References Count:39Y
JO - A study of secondary organic aerosol formation in the anthropogenic-influenced southeastern United States
ER -
TY - JOUR
T1 - A study of secondary organic aerosol formation in the anthropogenic-influenced southeastern United States
JF - Journal of Geophysical Research-Atmospheres
Y1 - 2007
A1 - Weber, R. J.
A1 - Sullivan, A. P.
A1 - Peltier, R. E.
A1 - Russell, A.
A1 - Yan, B.
A1 - Zheng, M.
A1 - de Gouw, J.
A1 - Warneke, C.
A1 - Brock, C.
A1 - Holloway, J. S.
A1 - Atlas, E. L.
A1 - Edgerton, E.
KW - AMBIENT AEROSOL
KW - atmosphere
KW - C-14
KW - emissions
KW - evolution
KW - GASOLINE
KW - OXIDATION
KW - PARTICLES
KW - RATIOS
KW - ZURICH
AB - [1] The formation of secondary organic aerosol (SOA) in an anthropogenic-influenced region in the southeastern United States is investigated by a comparison with urban plumes in the northeast. The analysis is based on measurements of fine-particle organic compounds soluble in water (WSOC) as a measure of secondary organic aerosol. Aircraft measurements over a large area of northern Georgia, including the Atlanta metropolitan region, and in plumes from New York City and surrounding urban regions in the northeast show that fine-particle WSOC are spatially correlated with vehicle emission tracers (e.g., CO), yet the measurements indicate that vehicles do not directly emit significant particulate WSOC. In addition to being correlated, WSOC concentrations were in similar proportions to anthropogenic tracers in both regions, despite biogenic volatile organic compounds (VOCs) that were on average 10-100 times higher over northern Georgia. In contrast, radiocarbon analysis on WSOC extracted from integrated filters deployed in Atlanta suggests that roughly 70-80% of the carbon in summertime WSOC is modern. If both findings are valid, the combined results indicate that in northern Georgia, fine-particle WSOC was secondary and formed through a process that involves mainly modern biogenic VOCs but which is strongly linked to an anthropogenic component that may largely control the mass of SOA formed. Independent of the radiocarbon results, a strong association between SOA and anthropogenic sources has implications for control strategies in urban regions with large biogenic VOC emissions.
VL - 112
SN - 2169-897X
IS - D13
N1 - 263D13302
JO - J. Geophys. Res.-Atmos.
ER -